diff --git a/src/BodyOnlyFormatter.php b/src/BodyOnlyFormatter.php
index 61932984..e8ed2bf4 100644
--- a/src/BodyOnlyFormatter.php
+++ b/src/BodyOnlyFormatter.php
@@ -1,5 +1,4 @@
 <?php
-
 declare(strict_types=1);
 
 namespace Lcobucci\ContentNegotiation;
@@ -18,5 +17,8 @@ public function format(UnformattedResponse $response, StreamFactoryInterface $st
         return $response->withBody($this->formatBody($response, $streamFactory));
     }
 
-    abstract protected function formatBody(UnformattedResponse $response, StreamFactoryInterface $streamFactory): StreamInterface;
+    abstract protected function formatBody(
+        UnformattedResponse $response,
+        StreamFactoryInterface $streamFactory
+    ): StreamInterface;
 }
diff --git a/src/ContentFormatter.php b/src/ContentFormatter.php
index 5e4c1003..c4e592cd 100644
--- a/src/ContentFormatter.php
+++ b/src/ContentFormatter.php
@@ -1,5 +1,4 @@
 <?php
-
 declare(strict_types=1);
 
 namespace Lcobucci\ContentNegotiation;
@@ -16,5 +15,9 @@ protected function formatBody(UnformattedResponse $response, StreamFactoryInterf
         );
     }
 
+    /**
+     * @param mixed   $content
+     * @param mixed[] $attributes
+     */
     abstract protected function formatContent($content, array $attributes = []): string;
 }
diff --git a/src/NotAcceptableFormatter.php b/src/NotAcceptableFormatter.php
index 632c3137..e21fd9f0 100644
--- a/src/NotAcceptableFormatter.php
+++ b/src/NotAcceptableFormatter.php
@@ -1,5 +1,4 @@
 <?php
-
 declare(strict_types=1);
 
 namespace Lcobucci\ContentNegotiation;
diff --git a/tests/Formatter/JsonTest.php b/tests/Formatter/JsonTest.php
index a1191c1e..6ae06d28 100644
--- a/tests/Formatter/JsonTest.php
+++ b/tests/Formatter/JsonTest.php
@@ -28,7 +28,8 @@ public function constructorShouldAllowTheConfigurationOfEncodingFlags(): void
     {
         self::assertSame(
             '["<foo>","\'bar\'","\"baz\"","&blong&","\u00e9","http://"]',
-            (new Json(JSON_UNESCAPED_SLASHES))->formatContent(['<foo>', "'bar'", '"baz"', '&blong&', "\xc3\xa9", 'http://'])
+            (new Json(JSON_UNESCAPED_SLASHES))
+                ->formatContent(['<foo>', "'bar'", '"baz"', '&blong&', "\xc3\xa9", 'http://'])
         );
     }